Libraries across the city supported the country wide event by holding a range of activities for all the family.
Nearly 1,500 people came through the doors of Central Library during the day, with hundreds more enjoying special events at district branches including Warstones, Penn, East Park, Spring Vale and Finchfield.
Activities ranged from competitions, crafts and poetry to enchanting tales from storyteller John Edgar and children's author Paul Dowswell.
Visitors to Central Library also took part in Poetry Lines, in which local poet Jane Seabourne collated quotes from members of the public on what they liked best about their library.
Councillor Elias Mattu, Wolverhampton City Council's Cabinet Member for Leisure and Communities, said: "I'd like to thank people for turning out in force to support our libraries on National Libraries Day.
"We received a high number of visitors across our branch network on Saturday, with many people taking the opportunity to become members of their local library for the first time.
"Libraries are an integral part of the community, and it is heartening to see that they still have a really important role to play in people's lives. Membership is free, and I'd urge anyone who hasn't yet joined to do so as soon as possible so they can start to enjoy the benefits of their local library."
To find out more about Wolverhampton's libraries, including locations and opening times, please visit Type=articles;Articleid=1703;Title=Libraries;.
National Libraries Day was supported by CILIP, the Chartered Institute of Library and Information Professionals, SCL, the Society of Chief Librarians, SLA, the School Library Association, and The Reading Agency.
- released: Wednesday 11 February, 2015